What could it mean

Meryuh

So when I go to pee and I'm done peeing right at that moment I get this pressure like pain that runs from my vagina/hips/lower back it's everywhere and very sharp in this areas and makes me feel like I gotta push or something an last about 10-15 seconds but it's only when I'm done using the bathroom , what could this mean? I'm 38+2 and it just started today